Electric heating unit.



PATENTED APR. 2, 19.07.

T. VAN ALLER. ELECTRIC HEATING UNIT.

APPLICATION FILED DEO. 29, 1905.

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Be it known that I, TYCHO VAN ALLER, a subject of the King of Denmark,residing at Schenectady, county of Schenectady, State Aof New York, haveinvented certain new and useful Improvements in Electric Heating Units,of which the following is a specification.

This invention relates to electric heaters,

o and has for its object the provision of a device of this characterwhich can quickly be brought up to the required temperature, is simpleand cheap in construction, and at the same time durable, safe, andefficient.

My invention relates more specifically to heating devices to be used inconnection with cigar-lighters, and while I do not limit my invention tothis particular application nor to the particular type of cigar-lighterI have found that it adapts itself very conveniently for use inconnection with the type of cigarlighter shown and described inapplication of Julius Tournier7 Serial No. 280,104, filed September 25,1905, In this type of cigarlighter a socket is provided which is adapted`to receive a plug of substantially the same 4character as that of anincandescent-lamp socket and plug. The lighter is provided with a handleand push-button adjacent thereto, so that by operating the push-button acircuit is closed through the heater-plug. It is the obj ect of myinvention, therefore, to provide an improved heater of this charl acter,and my invention may be said to consist in the features of constructionand the arrangement and combination of elements set forth, andparticularly pointed out in the claims annexed hereto.

In the drawings, Figure 1 is a sectional a view of a device embodying myinvention.

Fig. 2 is a sectional view on the line 2 2, Fig. 1, with theresistance-coils removed. Fig. 3 3 is a plan view of the device. Fig. 4is a view similar to that of Fig. 2 with the resistance-coils in place,and Fig. 5 is a view of the resistance-coils.

Referring to the drawings, 1 is a base or plug, preferably of porcelain,and may be of the type in common use in incandescent The metallicthreaded portion 2, adapted to screw into the lamp-socket, forms one ofthe terminals, while the metallic .tip 3 forms the other. The plug isformed with an enlarged head and is cored'out, as shown,

Specification of Letters Patent. Application led December 2921905,Serial No. 293,746.

,ing the coils firmly in place.

UNrrEn s'rArEs PATENT OEEICE.

TYCHO vAN ALLER, OF sCHENECTAnY, NEW YORK, AssiCNOR To GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW YORK.

ELECTRIC HEATING UNIT..

Patented April 2, 1907.

so as to admit the resistance-coils 4. This resistance is from acontinuous resistanceconductor, preferably of a nickel-steelwire ofsufficiently small section to permit direct connection across anincandescent-lamp circuit and wound into a series of parallel coils. Theplug is provided with the ledge 5, adapted to support the ends of thecoils which abut against the stepped portion 5', thereby hold- The coilsare thus supported at their ends, which will prevent the overheating ofthe other parts of the plug. One of the ends of the resistance-wire isconnected with the screwed portion 2, and the other end is brought downthrough the center ofthe plug and cemented therein to connect with thetip 3, as shown at 6. It has been found that in arranging coils asherein shown the outer ones, which do not receive so much heat from theother coils, cooloff more quickly, and to overcome this objection I windthese outer coils 7 and 8 so that the turns are closer together, therebyaffording a higher resistance and bringing the temperature up to thepoint necessary to get an even `distribution of heat. In the arrangementshown the coils are placed close together and separated from each otherby spacing-strips 9, preferably of mica. These strips also have theirends supported on the ledge 5 and are substantially the same in width asthe coils 4 are in diameter. The strips and coils are held in place inany desired manner, as by means of cement 9, which alsoboperates tosecure the ends of the coils to the base, so as to prevent theircontraction. The strips are thus substantially flush with the top of thecoils, so as to afford a support for the disk or shield 10. This shieldis of a material which readily transmits the heat from theresistance-coils, preferably mica, and is firmly supported around itsouter edge by the porcelain and over the remaining portion of thesurface by the spacing-strips. The shield may also rest upon the coils,if desired. The shield and coils are held in place by means of a cap 11,preferably of metal and secured to the side of the plug in any desiredmanner.. The cap projects over the shield for some distance, and is cutaway at the center, so as to afford access to the shield.

In order to preventl the undue heating of the cap, I have so formed itthat it is entirely out of Contact with the mica shield except IOOaround the edge of the central opening, as at 12. The edge of thisopening is beveled down into contact with the shield and in addition tosecuring the latter in place prevents the cigar-ashes and tobacco fromworking its wayv down under the shield and into the coils. This-cap maybe secured to the plug in such a manner as to be easily removable-as,'for example, by means oi: the projecting lugs 13. It will thus be seenthat I have provided a cigar lighter heating plug which is well adaptedfor efficient and durable service. The mica strips in addition tospacing the coils form a firm support for the mica shield, the life ofwhich is thereby increased, since it is not subject to bending non tobeing excessively heated in spots. T he form of unit, moreover, which Ihave shown is found to be very eHicient and durable in addition to beingexceedingly cheap, 'while my improved form of cap holds the parts inplace, while itself having very slight contact-surface to cause heatingthereof.

What I claim as new, and desire to secure by Letters Patent ot theUnited States, is`

1. An electric heating unit comprising an insulating-base, a series ofresistance-coils having their ends supported in said base,similarly-supported insulating spacing-strips between said coils, and ashield tor said coils adapted to be supported by said strips.

2. An electric heating unit comprising an insulating plug, a resistanceconductor wound into a series of coils and having only their endssupported in said plug, a shield for said coils, and a retaining-cap forsaid shield secured to said plug and having a central opening, said capbeing raised away from said shield and beveled around. the opening so asto form a bearing edge in contact with said shield.

3. An electric heating unit comprising an insulating-plug, aresistance-conductor wound into a series of coils arranged in a planeand having their ends supported in said plug, similarly-supportedinsulating spae ing-strips between said coils, a mica shield for saidcoils adapted to be s upported by said strips, and a retaining-cap forsaid shield secured to said plug and having a'central opening, said capbeing raised away from said shield but having the edge of the openingbearing thereon. y

4. An electric heating unit comprising aninsulating-basenresistance-conductorwound intoa series of parallel coilsarranged in a plane and having their ends supported in said base, theturns of the outer coils of the series being closer together than thoseof the inner coils.

5. An electric heating unit comprising an plane and having their endssupported in said sulating spacing-strips between said coils, a

insul ating-plug,a resistance-cond uctor wound into a series ot parallelcoils arranged in a plane and having their ends supported in said base,the turns of the outer coils being closer together than those of theinner coils, a mica shield for saidcoils, and means for securing saidshield to said plug.

6. An electric heating unit comprising aninsulating-plug,aresistance-conductorwound into a series of parallelcoils arranged in a plane and having their ends supported in said base,the turns of the outer coils of the series being closer together thanthose of the inner coils, a mica shield for said coils, and insulatingspacing-strips between the coils and adapted to support said shield.

T An electric heating unit comprising a porcelain plug, aresistance-conductor wound into a series of parallel coils arranged in aplug, the turns o1' the outer coils of the series being closer togetherthan those of the inner coils, similarly-supported insulatingspacingstrips between said coils, a mica shield for said coils adaptedto be supported by said strips, and a retaining-cap for said shieldsecured to said plug and having a central opening, said cap being raisedaway from said shield but having the edge of the opening bearingthereon.

8. An electric cigarelighter comprising a plug for an incandescentampsocket having a threaded stem to enter a socket, a refractoryinsulating-support, a continuous coil of rellexed resistance-wiresupported at intervals therein, refractory insulating spacingstripsbetween the several reflexes, and a cap containing an opening to admit acigar or the like.

9. An electric heating unit comprising an insulating-base, a series ofresistance-coils having their ends supported therein, insulating-stripsbetween said coils, and a shield for said coils adapted to be supportedby the strips. l

10. An electric heating unit comprising aninsulating-plug,aresistance-conductorwound into a series of coilsarranged in the base, and having their ends supported in said plug, in-

mica shield for said coils, adapted to be supported by the strips, and aretaining-cap for the shield secured to the plug and having a centralopening.

In witness whereof I have hereunto set my hand this 26th day ofDecember, 1905.

K TYCHO VAN ALLE-R.

Witnesses 2 BENJAMIN B. HULL, HELEN ORFORD.

